Thick Cylindrical Shells Pressure Vessel Equations and Calculator

For internal pressures higher than 3,000 psi, special considerations as specified in paragraph U-1 (d).
As the ratio of t/R increases beyond 0.5, an accurate equation is required to determine the thickness.
The formulae in ASME Appendix 1, Supplementary Design Formulas used for calculating thick wall
and design pressure, are: